What is IHL field of an IP packet, and how is it specified?

How many bits are in a IP address?

What is the TTL field of a IP packet? How is it modified and what happens when it is 0?

How many octets are in a header of an IP packet that has no options?

What is the protocol field going to be if the layer 4 payload of an IP packet is UDP?

If the protocol field is set to 1 in an IP datagram, what is the protocol of the payload of the IP datagram?

What part of the IP datagram is the checksum calculated for?

If you are told a host has an address of 64.17.33.2, but no other information, can you determine the network number and netmask of the network it is on?

If you are told a host has an address of 81.245.17.30/24, what is that hosts:

Network?

Netmask in dotted quad format?

If you are told a host has an address of 131.94.133.86/26, what is that hosts:

Network?

Netmask in dotted quad format?

If you are told a host has an address of 199.66.128.15/16, what is that hosts:

Network?

Netmask in dotted quad format?

If you are told a host has an address of 204.77.144.9/30, what is that hosts:

Network?

Netmask in dotted quad format?

If you are told a host has an address of 198.32.252.201/28, what is that hosts:

Network?

Netmask in dotted quad format?

A host has and address of 131.91.161.12 and a netmask of 255.255.255.128. What is the network the host is on, and the directed broadcast address for the network?

What IP addresses are available to assign to hosts on the network 128.227.116.0/24?

What IP addresses are available to assign to hosts on the network 129.171.160.0/19?

If you have been assigned a network of 66.88.64.0/20 and you want to divide it into subnets of 128 address (126 hosts), what would the new netmask be? What would be an example of one of the subnets addresses, including the new netmask.